As a result of the "right to forget" decisions of the Federal Constitutional Court, constitutional case law on the protection of fundamental rights in the multi-level system and on the relationship between fundamental rights under Union law and fundamental rights under national law has undergone a considerable realignment. In a recent article, Dr. Thomas Klein and Dominik Leist have dealt with the far-reaching consequences of these decisions both for the constitutional court's review standards in general and for labor law shaped by union and fundamental rights in particular. They conclude that these decisions have explosive power, especially in the area of collective labor law. The study was published in the current issue of the Zeitschrift für Europäisches Sozial- und Arbeitsrecht (ZESAR) on pp. 449-458.